>> mitt romney taking on president obama in the final debate. we'll talk to national secretary for the obama campaign and see what he's expecting kicking off this evening. >> apple trading in and out of correction territory. should this level be a warning for investors? we'll consult the charts. >> housing hits a four-year high in september. mortgage rates remain near all-time lows but a runaway housing recovery might be hampered by the banks. we'll talk to the founder and ceo of lending tree why lenders remain so hesitant to issue mortgages. meantime, caterpillar missing on revenue today due to decline in sales and a weaker global economic outlook. but earlier on "squawk box" on cnbc, caterpillar ceo doug oberhelman said there are still positive signs. >> there is a bright spot. we're past the bottom. i meet with contractors all the time. every once in a while we're hear about a new subdivision here, new subdivision there. it's coming. we need a lot more -- we need that housing start number to double, to start to move the economy. it's going to